can s130 1.0.0 send multiple packets per connect interval ?

[bingo]

hi,

1.I find some same issues on website, most of them can send more than 1 packet per connection interval up to 6 packets, but I'm not sure what version of sofedevice they use. Can s130 1.0.0 supports mulitple packets per interval time?

now, conn_params is

ble_gap_conn_params_t conn_params =
{
	6,
	6,
	0,
	100
};

connect interval is 7.5ms.

When press a button, following code is executed

  for(cnt = 0; cnt < 3; cnt++)
    {
        errcode = sd_ble_gattc_write(conn_handle, &write_param);
        if(NRF_SUCCESS != errcode)
        {
             printf("gattc write error\n");
        }
    }

cnt < 3 (sd_ble_tx_buffer_count_get() return 3)

2.but these 3 packets took 3 intervals. why?

3.after sd_ble_gattc_write() was called 3 times, I got BLE_EVT_TX_COMPLETE evt 3 times. why?

Best Regards!

[Petter Myhre]

You can see the BLE data throughput for the S130 SoftDevice here.

Edit 07.07.2015: As you can see from the tables it depends your device is acting as a peripheral or a central.

It seems you are acting as a central, with a GATT client that are sending write commands. From Table 2 you can see that if you are connected to one peripheral and you are using write commands you can achieve a maximum data throughput of 21.3 kbps. You can achieve this with a connection interval of 7.5 ms, 1 packet per connection interval, and 20 B (160 bit) payload.

160 * 1 /0.0075 = 21333.3 bps = 21.3 kbps.

[bingo]

hi, Peter, thanks for your reply. I have seen this chapter before, i want to know is there exactly number of packets s130 1.0.0 can send per connect interval? assume connect interval is 7.5ms, send 20 bytes per packet.

thanks!